Internal-combustion engine.



Patented Sept. 10,1918.

2 SHEETS-SHEET- I T. L. STURTEYANT. INTERNAL COMBUSHUN ENGINE.

APPLICATION FILED JUNE I6. 1911.

LL l fiizness;

UNITED STATES PATENT OFFICE.

THOMAS LEG'GET'l STUBTEVAN'I, 0F QUINCY MASSACHUSETTS, ASBIGNOR TO VAINT MILL COMPANY, A CORPORATION OF MAINE.

srun'rn- INTERNAL-COMBUSTION ENGINE.

Specification 01' Letters Patent.

v Patented se ia. 10.1918. 1

Application filed June 16, 1917. Serial 1Y0. 175,19

' VAN'I, a citizen of the United States, residing at Quincy, in the county of Norfolk and State of Massachusetts, have invented or discovered certain new and useful Improvements in Internal-Con'1bustion Engines, of which the following is a specification, reforence being had therein-to the accompanying drawings.

This invention relates to that class of internal combustion engines more especially adapted for use marine engines, and consistsof certain Improvements in the inven- .tions covered by the Sturtevant U. S.

Patents Nos. 1,164,675, and 1,185,951].

Inthe present improved engine the crank shaft" is carried. by hollow cross beams each Through these hollow beams the water iscirculated to keep the bearings cooled, and from these beams the water is forced upward through hollow standards or posts to a water box aii'ording a water jacket for the engine cylinders. From the water box the upward flow of the water is continued through the waterjackets of the cylinder heads, from whence it is discharged at or near the top, of the engine. Water is also preferablyff rculated from the cylinder heads through the valve stems and. vali e'sas in the construction shown by the Sturte'va-nt Patents Nos. 1,185,951 and In .thevaccompanying drawings Figure 1 is a partial sectional elevation'of an engine embodying the present invention, and Fig.- 2 is a vertical section of the same on the line ;2 -2,Fi .1.x

.o'the drawings, 12 denotes hollow cross beams which are bolted tolongi- Referring tudinal angle bars 13 by which they are connected together, said angle bars being secured inany suitable manner to the boat timbers or wooden beams 14; The beams 14. aiford' bearings for the crank shaft 15 and I which bearings are kept properly cooled by water forced by a suitable pump through a supp ly' pipe or manifold 16 which vommunicates, as through ports 17, with the chambers of the beams 12.

t l The supply pipe orllnanifold 16 will, in practice, preferably be provided with a regulating or subtraction valve, as in the engine of the Stur- 'tevant Patent, No. 1,185,951.

;The chambers of the hollow cross beams "posite beam surlnounting the waterbox and;

constructions shown in U. S. Patent-N box 18. These hollow standards or posts support said water box on said hollow cross beams and are removabiy bolted both to'said box and beams, so that the parts may be con-- veniently assembled or taken apart. While two hollow standards or'posts 20 are pref: erably provided for each hollowcross beam 12, to afford. plenty of water-circulating capacity, a single -'ho1low post or standard foreach beam 12 maybe used, if desired, the, other'standardor post between each beam 12 and the water -boir being solid. 7t

The chamber of the water box l8oommuni cat-es with the chambers of the jacketed cyl; inder heads 21, bolted or otherwise rigidly secured to the water bonds inthe usual man ner, through suitable water passages 18%, as in the construction shown in the Sturtei'ant" Patents Nos. 1,164,675 and'1',185,951, hereinbefore referred to. The; jacketed cylinder heads 2-1 are not only rigidly attached to the top of the water box 18 but are also detachably connected together by bolts 22 passing through the adjacent wallsof the cylinder heads and also preferably through Wedge plates or tapered liners 2'3 interposed be q tween. the cylinder heads. This construction @0 1 aflords what is practically a massive coin? adding greatly to the stiffness and rigidity thereof, thus afiording the necessary strength and stiffness notwithstanding the jholl'ew crmstruction of the engine frame-parts.

The cooling water circulated through the engine will preferably be discharged from the jacketed cylinder heads at or. near the tops thereof, as through discharge openings '10 24. The valves and the valve rods' or stem 26 are preferably formed hollowfas iri' tlie 1,186,860, so that the cooling water willfbe, circulated through the same, said valve rods "111 5 being provided at their tops with hollow heads 27 communicating by means of fiexi-' ble pipes 28 with the chambers of the waterjacketed cylinder heads 21. Thus a con 2 Que circulation of water introducediiegr base of the engine will be forced upward through the several hollow engine frame parts and be discharged at or near the top of the engine. The exhaust pipe 29 is preferably located. Within thefehamber of the water box 18, in the eonetri-iction shown in the Sturteveut Patents Nos. 1,164,675 and 1,185,951, so that it may be kept properly cooled. the said exhaust pipe is corrugated or provided with longitudinal ribs to augment the cooling effect of the water.

The lower partof the engine is properly housed by removable side-plutes 4.3, prov'ided with handles- 4.3", and a crank-casing 4.4, at the botton'l of the engine To avoid side strain on the hollow valve rods or valve stems 26, and thereby lessen cramping and friction on said valve rods or stems the valves are forced downward against the stress of their closing springs 80 to 0 "en the valves, balls 31, loosely resting and ightly lug in flat-lmttmned cupped seats lorr ed in the tops of the valve rods are interposed between. the rockers 32 and said valve rods or stems, rockers 32 are preferably operated from lifting rods 34 through the medium of balls 35 interposed between the upper ends of the said liftingrods 3 1 and the outer ends of the rockers 32 said balls 35 also preferably resting loosely in fiat-bottomed cupped seats in the upper ends of said lifting rods The rockers 32 are mounted on standards or brackets 45 on the cylinder heads 21.

From the fin-(ageing it will be understood that the present invention provides a water- 'eooled engine through the hollow frame pz tnts of which the cooling water st earned from the base olfthe engine to no its top that the cold Water is introduced at the parts of the engine requiring most cooling, or, in other words, to the parts which are most liable to be damaged by heat. Also the hollow-fra engine properly still-cued by the massive com posite beam at. its top afforded by the rigid connetdion of the cylinder heads together and with the water-box to which said heads, and also the engine cylinders are rigidlyattached. Also the con-- struction of the cngineis SllC-l'i that the parts thereof may be convenientlyassr-mbled or taken down. Also, in this improved construction the-whole thrust of the pistons on the cranks is taken by the izo'mpositebox and beam. combination of strength and rigidity.

The invention not to be understood. being limited to zilll--of the details herein In the present instance, however;

shown as such details may be varied widely, within the province of mechanical skill, without departing from the scope thereof.

Having thus described my invention claim and desire to secure by Letters Patout:

1 In a multiple-cylinder internal e0mbustiou engine, the combination with hollow cross beai'ns affording bearings for the enginc crank shaft, of means for rigidly securing cross beams together, a water box, engine 0 linders mounted in said water box, remova ly mounted hollow posts or standards su porting said water box on said hollow cross cams, the chambers of the latter communicating with the chamber of said water box through said hollow posts or standards, and means tor supplying water under pressure to said hollow cross beams.

52. in a multiplecylinder internal combustion engine, the combination with ,hollow cross beams affording bearings for. the en glue er'ank shaft, of means for rigidly sccuring said cross beams together, a Water hr t engine cylinders mounted in said water he remorably mounted hollow posts or standards supporting said water box on said hollow cross be ms, the chambers of the latfor communicating with the chamber of said water box through said hollow posts or standardsymeans for supplying water un der pr ore to said hollow. cross beams, and jacketed cylinder heads mounted, on and rigidly attached to said water box and rigidly connected together so as to afford a massive stiffening beam at the upper part of the engine.-

In a multiple cylinder internal-combustion engine the combination with hollow :Erame parts, including a water box through' which water may be circulated, of a plurality of cylinder heads rigidly attached to said water box and rigidly but removably attached together, so as to afford a massive stifiening beam at the upper part of the engine.

- 4-. In a nmltiple-cylinder internal combustion engine, the combination with hollow frame ports, including a water box through which water may be circulated, of a plurality of cylinder heads rigidly attached to said water box and rigidly but rcmovably attached together so as to afford a massive stili'oning beam at the upper part of the engine, and wed ge-shaped plates intcrposedbetween said. cylinder heads.

In testimony whereof I afiix my signature.

THOMAS LEGGETT STURTEVANT. 

